How to Fix Dead or Stuck Pixels Using UDPixel (Free Download & Guide)

If you’ve recently set up a new monitor and noticed a tiny spot that’s either constantly lit or permanently dark, that’s most likely a dead pixel. It may not stand out at first, but once you see it, it becomes hard to ignore—especially on high-end displays or laptops where every pixel matters.

In this case, UDPixel is a handy tool worth trying.

 

1️⃣ What is UDPixel?

UDPixel is a free and lightweight software designed to both test and attempt to repair dead or stuck pixels on your monitor. It comes in a portable .zip version, so you can run it without installation.

 

2️⃣ Key Features of UDPixel

  • Pixel Testing: Displays solid colors (red, green, blue, black, white, yellow) in full screen to help identify dead or stuck pixels.
  • Pixel Revival: Uses flashing windows to stimulate stuck pixels and try to reactivate them.
  • Multi-Window Flashing: Supports flashing multiple areas at once for multiple pixel issues.
  • User-Friendly Interface: Clean and easy to use—even for beginners.

 

3️⃣ Download & Install UDPixel

  1. Click the link below to visit the official UDPixel download page:
  2. The .zip version is portable and requires no installation. Just extract and run the executable.
  3. After unzipping, locate the file UDPixel.exe and double-click to launch the program.

 

4️⃣ How to Use UDPixel

Screenshot of UDPixel interface

➊ Step 1: Detect Dead Pixels with Color Cycle

  1. Launch the program and find the Color Cycle section.
    Set display time (in seconds) for each color.
    Example: Red: 3, Green: 3, Blue: 3, White: 3, Black: 3, Yellow: 3
  2. Click the Run Cycle button.
    The screen will cycle through the selected colors in full-screen mode.
  3. If you see a spot that stays dark or stuck in color during the cycle, it’s likely a dead or stuck pixel.

Tip: A white dot on a black screen or a black dot on a red screen usually indicates pixel issues.

 

➋ Step 2: Set Flash Window Count

Count how many dead pixels you found. In the Flash Windows field, enter that number (e.g., 2 if you found two).

This will create that many flashing boxes on your screen.

 

➌ Step 3: Move Flash Windows

Click and drag each flashing window to the exact location of the stuck pixel on your screen.

 

➍ Step 4: Adjust Flash Interval

The Interval setting controls how fast the flash blinks.
We recommend 10–30ms. Too fast (like 1–5ms) may cause screen stress.

 

➎ Step 5: Start Pixel Stimulation

Once everything is set, click the Start button.
Let it run for 2–3 hours. If the pixel is only temporarily stuck, it may begin working again.

⚠️ Warning: Don’t leave it running for more than 4 hours. Prolonged flashing can cause screen burn-in.

 

5️⃣ How Does It Work?

UDPixel works by rapidly flashing RGB colors over stuck pixels to try and “wake” them.
It’s a safe, non-physical method and is most effective for stuck (not dead) pixels.

 

6️⃣ Tips for Long-Term Screen Care

  • Use sleep mode or turn off the screen after extended use.
  • Avoid leaving static images displayed for too long.
  • Use screen savers to keep pixels active.
  • Don’t keep brightness and contrast at maximum all the time.

 

7️⃣ The Free Fix That Could Save Your Screen

If you’re dealing with dead or stuck pixels, UDPixel is a great first step before considering screen replacement.

It won’t fix every issue, but for stuck pixels, it’s a free and simple tool that just might save your screen (and your wallet).